Leading constitutional lawyer and longtime Harvard professor Alan Dershowitz, in what he considers "a very serious escalation" of the special investigation into Russian interference of the 2016 election, called the FBI's raid of the offices of President Donald Trump's longtime personal attorney Michael Cohen on Monday "a shocking and disturbing development."

He added the development "should shock everybody, no matter what part of the partisan divide you're on."

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Leading constitutional lawyer and longtime Harvard professor Alan Dershowitz called the FBI's raid of the offices of President Donald Trump's longtime personal attorney Michael Cohen "a shocking and disturbing development" and "a very serious escalation" of the probe.